Technology involved in carbon dating
Remember that this correction is based on measurable scientific data, not on any creationist preconceptions.
We need to consider two other effects: In any case, even the incorrect ‘uniform’ model has given, in many cases, serious embarrassment to evolutionists by giving ages which are much younger than those he expects in terms of his model of earth history.
The model of radiocarbon dating which Libby developed, using his incorrect ‘uniform’ assumption, must therefore be corrected to fit the facts about C to start with, so they have an even greater error.
In other words, the further you go back, the more you have to shrink the radiocarbon dates to make them fit the facts.
Once an organism dies, it stops taking in carbon-14.
Think of it like a teaspoon of cocoa mixed into a cake dough—after a while, the ‘ratio’ of cocoa to flour particles would be roughly the same no matter which part of the cake you sampled.
The fact that the C doesn’t matter in a living thing—because it is constantly exchanging carbon with its surroundings, the ‘mixture’ will be the same as in the atmosphere and in all living things.
It is assumed that the ratio has been constant for a very long time before the industrial revolution. (For on it hangs the whole validity of the system.) Why did W. Libby, the brilliant discoverer of this system, assume this?
Libby knew that C was entering and leaving the atmosphere (and hence the carbon cycle).